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Finding the Fourth Proportional to 455,428.90, 683,143.35 and 266,472.10

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Solution

The fourth proportional to 455,428.90, 683,143.35 and 266,472.10 is: 399,708.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,428.90 : 683,143.35 = 266,472.10 : x
  2. Step 2: Convert to fraction form
    455,428.90/683,143.35 = 266,472.10/x
  3. Step 3: Cross multiply
    455,428.90x = 683,143.35 × 266,472.10
  4. Step 4: Simplify right side
    455,428.90x = 182,038,643,075.54
  5. Step 5: Solve for x
    x = 182,038,643,075.54/455,428.90
  6. Step 6: Final answer
    x = 399,708.15

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.